So far this thread is a mix of YES, NO, & MAYBE.
Clear as mud, right?
Its pretty clear, it totally depends what you work on. If it's old junk, yes, garden equipment, yes, big stuff, yes, modern cars, probably not.
It would be interesting to hear from the OP, who started this thread back in 2015, if he bought SAE and if he used them.
Growing up in Europe in the 90s, there's no need for imperial sockets, metric (or 'standard' as we call them) are on everything from at least as far back as the 80s. It is kinda handy to have imperial sockets to hammer onto a damaged fastner or locking lug nut thou.